What is the difference between a semi-precious and a precious stone?
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What is blast hole?
What is economic geologists?
What is concentrate?
Explain what separates the outer core from the mantle above it?
Why does marble rarely contains fossils?
What is conductors?
Explain how has the earth changed since it was formed?
What is mineralogist?
Explain why does a glacier move?
Describe the main types off rocks. How the different types of rocks formed ?
What is the mantle made of?
What makes mountains appear purple?